Submission #83091

#	Time	Username	Problem	Language	Result	Execution time	Memory
83091		chunghan	막대기 (KOI13_game)	C++17	0 / 100	68 ms	11792 KiB

game

#include<bits/stdc++.h>

using namespace std;

typedef long long int lld;

int N, L, A[100000], B[100000];

vector<int> X[100000], Y[100000];

lld D[100000], dist[100000];

lld solve(int i) {
    if(D[i] != -1) return D[i];
    int x = A[i], y = B[i];
    lld ret = 0;
    for(auto p : X[x]) 
        if(B[p] < B[i] && p != i)
            ret = max(ret, solve(p));
    for(auto p : Y[y])
        if(A[p] < A[i] && p != i)
            ret = max(ret, solve(p));
    //cout << i << ' ' << ret+dist[i] << endl;
    return D[i] = ret + dist[i];
}

int main() {
    ios::sync_with_stdio(false);
    cin.tie(nullptr); cout.tie(nullptr);
    memset(D, -1, sizeof(D));
    cin >> N >> L;
    for(int i = 0; i < N; i++) {
        int x, y;
        cin >> x >> y;
        A[i] = x; B[i] = y;
        X[x].push_back(i); Y[y].push_back(i);
        dist[i] = abs(y-x) + L;
        //cout << i << ' ' << dist[i] << endl;
    }
    lld rst = 0;
    for(int i = 0; i < N; i++) rst = max(rst, solve(i));
    cout << rst;
    return 0;
}

• Subtask 1: 0 / 11
• Subtask 2: 0 / 13
• Subtask 3: 0 / 16
• Subtask 4: 0 / 22
• Subtask 5: 0 / 38